How many molecules are contained in 90.0 g of h2o?

1 Answer
May 25, 2018

3.01*10^24

Explanation:

Divide 90 by the Mr of Water that is 18
2+16=18
then find the moles. Divide mass by the Mr.
90/18= 5 mols
Then multiply it by the Avogadro Constant
5*(6.022 *10^23)
3.01*10^24